Hydrogen peroxide production by a marine phytoplankter1

Limnology and Oceanography - Tập 32 Số 6 - Trang 1365-1369 - 1987
Brian Palenik1, Oliver C. Zafiriou2, François M. M. Morel3
1Ralph M. Parsons Laboratory Bldg. 48-320 Massachusetts Institute of Technology Cambridge, Massachusetts 02139
2Woods Hole Oceanographic Institution 3‐10 Redfield Woods Hole, Massachusetts 02543
3Ralph M Parsons Laboratory, Massachusetts Institute of Technology

Tóm tắt

Hymenomonas carterae, a calcified marine phytoplankter, produces hydrogen peroxide extracellularly. Hydrogen peroxide production by a washed cell suspension occurs in the dark and is inhibited by cell‐impermeable protein modification reagents. A cell‐surface redox enzyme is thus likely responsible for production of H2O2. The physiological function of this potentially toxic compound is unknown. If the production rate of 1–2 × 10−14 mol cell−1 h−1 measured in cultures of H. carterae could be generalized, marine phytoplankton would be an important source of the hydrogen peroxide found in the marine environment.

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Limnology and Oceanography

Tập 32 Số 6

1365-1369

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